Power unit



May 30, 1933. ,f F. H. POOR 1,911,465

` PWER UNI' 1I Fiiednec. `19. 1928 2 sheets-sheet 1 111mm Mmmm lll" IN VEN TOR.

A TTORNEYS.

May 30, 1933. F; H- POOR 1,911,465

POWER UNIT 2 Sheets-Sheet 2 Filed Dec. 19, 1928 Fcar'z'cf It. Poor,

INVENTOR. v.

JMW/fw ATTORNEYS.

"plication,

v '1 ;l and `Patented 'May 30,

UNITED STATES PATENT or-'FlcE FBEDEBiIC H. 0F YONKEBS, NEW YORK, ASSIGNOB, BY MESNE ASSIGNMENTS, TO BUCYBUB-ERIE COMPANY, OF SOUTH MILWAUKEE, WISCONSIN, A CORPORATION Ol' nnnawm rowEn UNIT Application -led December 19, 1928. Serial No. 326,830.

The present invention relates to mobile power units and more particularly is di-4 l unit has been improved as compared with ,existing powerunits of the same eneral type, t e improved mounting of t 1s 1nvention being of such a character that the usual tractor, i. e., a power unit equlpped with its own pro ulsion mechanism mabe lreadily converte into a hoisting mac for example, it lbeing understoodl of course that after being so changed over the machine is still ca `able of use asv a tractor for the' purpose o drawing a trailer or other appas ratus from-one point to another.

In the drawings accompanying this ap- Fig. 1 shows an embodiment of the presentinvention in front elevation and partly r 'insectiony Fig. a a section on he line 3 3 of Fig. 1. Fi 4 is a side elevation of my invention a section on the line 2-#2 of Fig.

vshowing both axles of the mobile power unit of my invention, with the associated parts of,

m crane-frame.

ferring to' the drawings in detail, the present invention provides a machine to be termed throughout this description and throughout the appended claims as Aa tractor crane, -including a traction base embodying l front and rearaxles, a crane frame supported thereon inA a manner to be hereinafter referred to in detail, and an engine and engine frame.

The crane frame will comprise, for instance, a hoisting crane with the necessary apparatus for operating the same. Inasmuch as the construction of the crane and 'of the fpropulsion mechanism, etc. forms no part o the resent invention the same will not be descri lin detail herein.

In the specification 'and claims, the'terms tractor crane and crane frame will be employed illustratively, rather than restrictively, and shall be taken to cover broadly any similar 4auxiliary equilsnent other than cranes strictly s eaking. is obvious from an inspection o Fig. 1, the word axle, as applied to my invention does not mean' a transverse member the ends .of which are machined to serve as bearings for wheels, but rather means any transverse load-supporting member, the ends of which are adapted to be supported by traction elements. It is in this broader sensethat the ,word axlef will be lused'throughout the specification and claims.

The front axle of the traction base is shown at 1. Above the axle is the cranev frame of the machine, lthis frame comprising the side members 2-2 running from the front of the machine rearwardly to or adjacent the rear axle 16 to which' the are attached. Within .the space define by the side members 2-2 of the crane frame are crane frame members 3 3 which may be,

for instance, in the form of channels extendin verticallyas shown in Fi s. 1 and 4.

he mountingfof the crane rame, and the mounting of the engine frame, both considv L ered with res ect to the axle 1, are the prime features of t e present invention.

. An inspection of Fig. 1 will show that 4 i designates a bolster extendingy transversely of the traction base, and provided wi a rearwardl extending bifurcated portion straddling the leaf sprlng 6', this spring also extending transversely of the machine and being attached by suitable links at 'the ends Aof the spring to the axle as shown at 7 and 8.

The extension 5 of the bolster and the spring 6 are both at the rear of the axle 1. The bolster also has a forwardly extending portion 9- overlyin the axle 1 as shown in 3 and exten ing a short distance in front thereof. That portion of the bolster immediately overl in the axle is provided with a buffer 10 e ru ber, for example.

' The bolster extends laterally as viewed in Fig. 1 from thatportion 'which straddles the spring to and beneath the side frames 2 of the crane frame the same.

toenaeandsu ort".

The side members 3 of the crane frame are rigidl secured to the members 2 as by bolts 11. he members 2 are joined to ether by the cross-member 13, as shown in igure 5 3, this cross-member. serving not onlyto stifen the crane frame laterally, but also to serve as a front bumper. l

Engine frame 151 is secured to the bolster 4 by ythree centrally located bolts 15, which are spaced so closely together as to constitute practically a sin le point of support. Thus both the crane rame and the en 'ne frame are su ported on the bolster 4 w ich as above exp ained finds its support on the springt. As above pointed out the side members 2 of the crane frame f the machine extend rearwardly to the rear axle-.16 to' be supported thereby in any suitable fashion, and since-the engine frame is supported at the rear in the conventional manner on the rear axle, and in the front on the same bolster that supports the crane frame, and since the frames are rigidly secured to each other and the whole structure is supported by the spring 6 and the rear axle, the spring 6- being attached at each end to the front axle, it will be seen that the engine frame is dependent of the main frame and has a three two at the rear, while the crane frame has a four point mounting, two at the front and two at the rear.

The structures shown at 12, at each side of the machine, are stabilizing devices, but inasmuch fas these devices constitute the subject matter of a coending application Serial No. 326,931, file December 19, 1928, the same will not 4be referred to in detail. It is evident that various modications ma be made in the construction above descnbed within the purview of this invention.

What is claimed is 1. In a tractor crane, the combination of: a traction base, including front and rear axles, a spring supported adjacent its ends by the front axle, and a bolster su ported adjacent its center by the spring, an at will point mounting, one at the front and of said base, and supportable at two widely a crane frame resting on the ends of said bolster; and an engine frame rigidly secured 'to said crane frame.

4. In a tractor crane, the combination of: a transversely extending bolster; a transversely extending spring; an axle to which the extremities of'the spring are attached; means for attaching the bolster to the spring at a point-intermediate the ends of both; av

furcated'projection on the bolster, extending rearwardly to straddle the spring at the rear of the axle; and means for attaching the bifurcated projection of the bolster to the spring. ,y i n 6. n a tractor crane, the combination of: a traction base; a crane frame, supported at two widely separated points adjacent one end separated points adjacent the other end of said base; and an engine frame, supported at'two lwidely separated points adjacent one end of said base, and suppontedadjacent the center ofthe other end ofsaid base; said two frames being mounted dependently of each other. Y

This specification signed this 17th day of December, 1928.

j FREDERIC H. POOR.

4at two widely separated-points by the fronti axle; a crane frame, supported at two widely separated points on said bolster; and an engine frame, supported on said bolster adjacent the centerof said bolster' vsaid two frtmes being mounted dependently of each o er.

attached; and a spring engaged 2. In a tractor crane, the combination of tween the bolster andt e spring, intermel diete-the ends of both bolster and spring; 

